Ge dayton



Feb. 27, 1923. 11,445,471

C. L. MCC U EN EXPANSION VALVE FQR REFRIGERATING: MACHINES AND THE LIKE Filed No1/z. l, 1919 v WMM Patented Feb 2?, i923.

N l il gsrarssfPATENr OFFICE.

CHARLES L; NEUQUEN, OF-EVANSTON,LLINOXS, ASSIGNOR, BY MESNE ASSIGNIMENTS, T0 DELCO-LIGH COMPANY, F DAYTON, OHIO, A CORPORATION 0F DELAWARE.

nransioiv vanv'n non annate-annuaire Mneiiiivns AND THE LIKE.

application filed November 1, 1919. SerialNc. 335,(l34.

a citizen ol. the United Cltates, residingat duced into the system iiik the connections between the covienser andthe expansion chamber the `iinproved valve being` particularly )ted for use in retrigerating systeins ol ne character employinga refrigerant which boils at atmospheric pressure at a suticicntly vlow degree below the troef/iingg; point to produce the temperature required in the refrigerator at atmospheric pre `Vaire. l

lt is the primary object oithel kinvention to so construct valve ot the described character to redufie to a niinixnuin the likelihood ot the valve being; rendered inop-` erative or held in an inoperative position by the accumulation of toreio'n materials in the vicinity ot the valve seat.

lt is a further object of the invention to provide in a valve oi the `described character improved ineans tor controlling the moving parts ot' the valve throughout all its operating` nioveinents and` adjusted' inoveinents in such a inanneras to prevent the valve troni becoming unseated hy tilting or cantingg at any tinie during.;v its operation when intended to be seated. i

is a further object oi4 the inveutioirto provide an expansion valve ot the described character/which is Vso constructed that it ina); ne easily assembled and likewise easily taken apart tor purposes ot adjustment atteicliine. y y

1t a further object of the inventionto ynfovide certain improvements ina valve of the described character wherebythe parts able s y in granted January 1d, 1919, eX- pension valves o't this type being intro-A Vdenser to the expansion valve.

its installation in a refrigerating nia-f ofthe valve liable to wear and needing adjustment or renewal are niade easily detachand removable, thereby attaining econoniy in manufacture as well as in repairs should repairs or renewal of parts beconie desirable or necessary during the life of the valve.

Other objects otthe invention will appear cfrein the following description which is directed to the preferredembodiment ot the invention as depicted also in the drawing, the 'features of novelty the appended claiins.

tion view ot the valve and Fig. 2 is a side elevation ot saine with a part thereof broken away showing` 'the valve casing in section adjacent the outlet port and duct ot the valve. 'Fi/g.' 3 is, avert'ical sectional view throughthei complete device ot Figsxl and being set forth in 2 illustrating-`thel details of construction,`

particularly ot' the interior movable parts ot the valve.

The reference character 10 indicates Igenerally a cast-ing' or valve housing comprisingr an approximately circular plate indicated by the reference character 11 witha literal extension 12 near the central part thereof, having' a hollow interior as indicated at'13, 14, the interiors 13,14 being;

separated by apertorated ledge 15 having y a valve'y seat as indicated at 16 'formed around the perforation vin said ledge'. The outer extremity of the projection 12 is screw threaded as illustrated in il 8 to take the angle pipe litt-ing' 17, which is adapted to be connected with the intake pipe 18ct the system, normally leading' from the con- The angle fitting 17 may be provided with the integral wines or brackets 19, 20 perforated as illustrated in Fig. 2 tor attachment ot the valve toL sonic stationary or fined-part ot the refrigerator or apparatus connected therewith for supportingl the valve.

21 is the valve proper, preferably toi-ined witlra conical surface as illustrated in Fig.

S'and being' provided with a valve stein 'of elongatedv orin extending` through the valve opening into' andl through the chainber 13 into an enlarged chamber torined 4on the reverse side ot the plate 11 and closed lby a substantially herni'spherical plate 24,

` which is constructed so as to be detachably secured to the outer circumference ot the plate valve z maden;

23 and 29 will again he sealedhy replacing the cap 30.

@ne ot the diliculties round in the type of valve shown n the .said l/Volt Patent No. c

invention obviates -hisdiiiiculty b v closing.

and sealing the chambers 23 and 29 at substantially atmospheric pressure which will prevent free; circulation of ratmosplicre and couscfguent accumulations of moisture there-4 in, which might become` 'frozen and, ini-v pede the Working of the ymovable parts the v ive.,

Another `important feature of 1Lhc present or the valve'stem Q2 insuringthat the'valve 2l will rise and tall in a substantiall;7 latA eral directiony and be retained at all 'times in lits.u'iovenients substantially perpendicular to the normaler undeiiectedplane of the diaphragm `E26 in its position of 1rest insuring at all valve. i

ln the operation of thevalve in a refi'l'igerating system of the described character, it. is ivelly understood thatV condenser pressure ol the refrigerant will` maintain at all timesL in the pipeflS leading` to the condenserjand in the chamiher le adjacent the valve 2i which will remain closed on its seat sor long the substantially atmospheric pressure within chambers 23 and 29 is not su'llicient to overcome the pressure in chamber 'i3 and in that part ofthe systemleading,` from the fion valve to the expansion coil. l-loivH c decrease helovva. predetermined det ecot the pressure maintained in rthe.,exgansion coil liv reason or the operation of the ordi iuirv condenser pump, which is in the usual manner connected with the expansion coil, ivill cause the substantially atmospheric rcssure on the diaphragm.r to unseat the winst they reduced area of .pressure ou the top of the valve onthe condenser side thereof with the result that such riusciting` oit the valve will permit quantities or slugs the refrigerant to pass through the valve and enter the expansion coil until such time as the pressure therein will be sufficient to counteract the substantially atmospheric piesscu'e ou the diaphragnn causing the valve to be ieseated liv means of vthe ad;l

iustnicnts described, b v ving' the tension' of the spring` 3T `it will be seen that the valve mav lc-causfed to operaie at miv desired pressure Within the exp 'ou coil. thus regulating the temperature et the refrigerant therein.r

order that the invention might be understood the details of the preferred emtimes proper seatingiot they hodiment have. been' set forth, but it will he apparent that persons skilled in the art may resort to various modiiications Without de- ;iarting from lthe purpose' and spirit of my invention. f i

` lclaim: l

login` a device ot the described character, the combination wth a valve chamber proed withA passa Oesadapted to have operat. connections with a fluid circuiatory system al Wall dividing the said chamber into tivo compartnuentsan each oi' Which is in communication with the said respective passages leading to the circulatory system.y a valve iseat adjacent an opening in the said Wall, a valve cri-operating' with said valve seatj a valvey stem connected with the valve7 a` ilexilole diaphragm in one oi said compartmentsj vid 'means for connectingsaid valve stem with invention resides in the elongated character h said diaphragm, including a sleeve connected at one end vto the diaphragm and at the other end to the valve stem, and a cover closing the said compartment containing the diaphragm, being arranged to exclude moisture in the surrounding atmospherel trom contact with vthe diaphragm.

2; ln a` device o'l' the described character, the comhination-With a valve chamber provided with passages for connection with a. fluid circulatory system5 a Wallvdividing the said chamber .into tivo compartments each ol `which compartments is in communication with one or' the said passages., a valve seat adjacent an opening; in the said Wall, a valve cci-operating with said valve seat5 an elon- Agated valve stem secured to thevalve and extending;` into one o'iL the said compartments, a flexible diaphragm secured to the. iv; lls oit the comp rtment into which vthe valve stem entends there being an opening' .in said diaphragm through which the said falve stein is extended7 means' 'for forming a gas tight unionI between the said vaive stem' and the said ile.. ole diaphragm.y a cover tor the said compartment containing the said diaphragm and valve stem7 means connecting the said valve stem. with the 'denvibie diaphragm. includingV a sleeve connected at one end of the diaphragm and at the other end to the valve steun' and elastic means for resisting the movement oi' said valve in one direction. l

Il; ln a device t the .ilescfilrl cl'iiiracter. the combination with a, valve. ot' a valve stem connected therewith. chamber.. :i wall in said chamber provid therein a valve seat ,in ie said vfall surrounding' 'jd onenin a valve stem coniso for forming a tight union between the valve stem and the diaphragm comprising an elongated sleeve and suitable means for clamping said sleeve in contact with the diaphragm, plate secured to Said sleeve, means tor adjusting said plate in relation to said sleeve, a cover for said chamber adapted to exclude moisture rom contact with thedianhragm in the chamber, a ledge or stop mounted on said cover, and resilient means interposed between the said ledge or stop und the said adjustable plate on the said valve stem sleeve.

el. ln a device ci' the described character, the combination with a. valve chamber of a valve and a valve seat therein, an elongated stem connected with said valve, a flexible diaphragm dividing said chamber into a pluraiitv of compartments, a cover plate covering the end of the valve chamber on the side oi" the diaphragm remote -from the said valve and valve seat, there being an opcninfv in the said ilexible diaphragm through which the valve stem is extended, means Yfor securing a gas tight union between the valve stem and the flexible diaphragm adjacent the valve stem opening therein, said means comprising in part a. sleeve surrounding a portion ot the valve stem on the side ot the flexible diaphragm remote irom the valve, and means for norn'iallv seat-ing the said valve comprising an elastic means for resisting the movementot said valve in one direction and an adjustable device secured to the said valve stem sleeve.

ln a device of the described character, the combination with a valve casing having a partition or wall therein and dividing the casing, there being opening in said partition or wall, a valve seat around said opening. a valve co-operating with said valve seat, a substantially circular iiange forming an enlargement oit the wall of said valve chamber, a diaphragm secured to the pei hery ci the said enlarged circular portion ol ne val e chai'nber, a cover plate secured to the said enlarged portion of the valve chamber, and forming a compartment therewith, a second cover plate secured to an opening in the rst said cover plate and forming a continuation of the compartment on the reverse side ot the diaphragm 'from the said valve, there leing an opening in the said diaphragfm, a valve stein connected with the iid valve and extending through the opening in the diaphragm, a sleeve surrounding a portion oit the said valve stem, means for forming gas tight union between said sleeve and that portion of the said diaphragm around the said opening therein, adjustable means secured to the said sleeve surroui'iding` the valve stem, a part in lined relation with said valve chamber, and a coil spring interposed between said adjustable means and said part.

3. ln a device of the described character, the combination with a valve chamber provided with passages adapted to have operative connections with the fluid circulatorjT syst-em, a wall dividing said chamber into two compartments, each of which is in communication with the said respective passages leading to the circulatory system, a valve seat adjacent an opening in the said wall, valve co-operating vwith said valve seat, a flexible diaphragm in one of said compartments of the valve chamber and beingspaced apart from the said wall bearing the valve seat, an elongated valve stem connected with the valve and with the diaphragm and extending on the side ot' the diaphragm`opposite the valve, and elastic means connected with the extended portion ci' the valve stem on the side of the diaphragm opposite the valve for normally seating the valve.

'Y'. ln a device ot the described character, the combination with a valve chamber provided with passages adapted to have operative connections with `the luid circulatorj,Y system, a wall dividing said chamber into two compartments, each of which is in communication with the said respective passages leading to the circulatory system, a valve seat adjacent an opening in the said wall, a valve co-operating with said valve seat, a flexible diaphragm in one of said compartments of the valve chamber and being spaced apart from the said wall bea-ring the valve seat, an elongated sleeve surrounding `the elongated valve stem, said sleeve being secured to form a gas tight union with the diaphragm and having` the tree end thereof secured to the tree end ot the valvestem on the side ot the diaphragm opposite the valve, adjustable means secured to the free end ot the sleeve, a stop secured to the chamber wall and elastic mea-ns interposed between the last said means and said stop.

ln testimony whereoi l have signed lnjv name to this specification, on this Qsilth dav of October D.. 1919.

CHARLES L. lvIcCUlN. 

